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CHRISTOPHER F. PEARSON, OF PORTLAND, OREGON.

ROOFING COMPOSITION.

SPECIFICATION forming part of Letters Patent No. 234,425, dated November 16, 1880.

Application filed April 521, 1880.

To all whom it may concern:

Be it known that I, CHRISTOPHER F. PEAR- SON, of Portland, county of Multnolnah, and State of Oregon. have invented a new and Improved Roofing Composition; and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention is an improved roofing-paint composition, the ingredients of which and the manner of applying the same will be fully described hereinafter.

The manner of using the composition is substantially as follows: The roof to which the improved covering or lining is to be applied must first be made clean and dry. The same is then given one coat of ordinary primingpaint, and after this has dried a second coat of paint, composition, or paste, consisting of a mixture of yellow ocher, whiting, litharge, india-rubber, and boiled linseed-oil, which is applied to the roof by any suitable means, but generally with a stiff paint-brush. Vhile this coating is still wet the entire surface is covered by a cloth, which is laid evenly upon it and pressed down with the fingers, so as to remove all wrinkles and blisters. The cloth used generally is muslin; but any other suitable cloth may be used, if desired. The cloth, when thus secured to the roof, is covered by a coating of thin paint, consisting, principally, of whiting and boiled oil, the same being applied to the cloth until the latter is thoroughly sat- (No specimens.)

urated. After this last coat of paint has dried one or more coats of paint, with or without sand, may be applied. I do not regard the sand as essential, however, as the roof is sufficiently well protected without it.

The covering or lining thus constructed, although applied to a metal roof, is not liable to crack by reason of the expansion and contraction which result from heat and cold.

The covering, being closely united to the roof and forming one substance with it, is not liable to be destroyed by fire, it being difficult, if not impossible, to raise the temperature sufficiently high to cause combustion.

The paint or paste composition, being adhesive in its nature, unites the muslin to the roof without the aid of any fastening devices whatever.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The roofing paint composition described, consisting of yellow ocher, whiting, litha-rge, india-rubber, and linseed oil, in about the proportions specified.

This specification signed and witnessed this 4th day of March, 1880.

. 0. F. PEARSON. Witnesses:

WM. E. SGHRAMM,

EUGENE D. WHITE.

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